On Sat, 29 Mar 2008, Mark Lord wrote:

quoted text
> Just happened again.  The machine resumed from RAM with no functioning USB.
> Still running the exact same 2.6.25-rc7 kernel as before, with the RTC conflict fixed.
> 
> WTF?

The first step in debugging this is to build a kernel with
CONFIG_USB_DEBUG and send the dmesg log following an unsuccessful
resume.  Include events from before the suspend; don't strip them out.  
If the symptoms are the same as before then you should also get a stack
dump for the ksuspend_usbd task.

Alan Stern

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